modelcontextprotocol/typescript-sdk

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This is the main branch — v2 of the SDK, now in beta (@modelcontextprotocol/server, @modelcontextprotocol/client), implementing the 2026-07-28 MCP spec. > Have feedback? Please open a v2 issue — it is the most useful thing you can do for the SDK right now. The v2 documentation starts with a ten-minute server tutorial. > We expect a stable release alongside the full release of the 2026-07-28 spec on July 28, 2026. Until then, v1.x remains the supported release for production; it keeps receiving bug fixes and security updates for at least 6 months after v2 ships. v1 documentation: ts.sdk.modelcontextprotocol.io · v2: /v2/.

We're limiting pull requests to 1 per new contributor while we land…

Excerpted from github.com/modelcontextprotocol/typescript-sdk